Effect of ultraviolet-B radiation on arbuscular mycorrhizal colonization of two rangeland weeds
Agnieszka Synowiec , Hamid Madani
AbstractOur experiment aimed at assessing the influence of ultraviolet-B (UV-B) radiation on the growth and colonization of roots of two invasive rangeland species: houndstongue (Cynoglossum officinale L.) and downy brome (Bromus tectorum L.) with arbuscular mycorrhizal fungi (AMF). As a result, after 13 weeks of growth in the presence of 8 kJ*m-2 UV-B radiation (estimated as 23% of ozone layer depletion), a significant reduction of houndstongue’s lamina length, leaf area, shoot and root dry mass was noted. As for downy brome, only the stem length and shoot dry mass were negatively affected. Nevertheless, the intensity of UV-B radiation downy brome developed a similar number of inflorescence. For both species in the presence of elevated UV-BBE radiation, a significant reduction in the AMF colonization was noted, especially for hyphae and arbuscules. In conclusion, the elevated UV-B radiation may affect the performance of both weeds and relate with their competition abilities.
|Journal series||African Journal of Microbiology Research, ISSN 1996-0808, (0 pkt)|
|Publication size in sheets||0.5|
|Keywords in English||Arbuscule, downy brome, growth, houndstongue, hyphae|
|ASJC Classification||; ;|
|Publication indicators||: 2013 = 1.132; : 2011 = 0.539 (2) - 2011=0.564 (5)|
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